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Physical Science Review
Physical Science Review
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A general review of 1st semester content from chapter 1-5
Flashcards
41 cards
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Questions
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Answers
1
How do mixtures differ from pure substances?
The properties of a mixture can vary not fixed
mixed composition
no composition
fixed composition
2
You can be certain that a chemical change has occurred when
a.there is a visible change
the change is irreversible.
The temperature changes.
a new substance is formed.
3
What units do scientists use for their measurements?
United States system
metric
SI-Système International d’Unités.
non system of measurements
4
What is a variable?
A part of the exper. that CAN be changed then tested.
a vegtable
A part of the exper. that CANNOT be changed or tested.
cannot be tested
5
What are the rows( horizontal) of the periodic table called?
Family
group
periods
valence
6
What is a hypothesis?
Problems
A type of equation
An educated quess
something that always right
7
9. When a group of atoms share electron(s) to help complete both of their outer shells:
James Bond
chemicaL BONDS
covalent bond
ionic bond
8
The SI base unit for temperature is
Celsius(C)
none
Fahrenheit(F)
kelvin (K).
9
What is the most stable configuration of electrons in an atom?
SOME STATE
EVERY STATE
NO STATE
GROUND STATE
10
What is the goal of a scientific method?
To look at information
An organized plan
To make an educated guess
It stay the same
11
What are two types of chemical properties ?
Malleability
Flammability and reactivity
Conductivity
Filtration
12
What is the main difference among solutions, suspensions, and colloids?
some differences
how it looks
no difference
Based on the size of its largest particles
13
what is control?
what you keep the same in an experiment
what you change in an experiment
what you keep the same in an experiment
what you compare your experiment to
14
3.What is the main purpose of a scientific model?
to show a large object, such as the Earth, in a smaller form
to prove a theory
to show how a hypothesis was developed
to make complex concepts easier to understand
15
3.How can you convert a temperature expressed in kelvin (K) to degree Celsius (°C)?
subtract 273
add 32
subtract 32
Add 273
16
Why is scientific notation useful?
Easier for scientist to work with
Scientists often work with very large or very small numbers.
expressing a value as the product of 1 and 10
not useful
17
How does a scientific law differ from a scientific theory?
a statement that summarizes a pattern found in nature
no different
same no different
It is The explanation of such a pattern
18
What is the difference between two isotopes of the same element?
different neutrons
same protons
same neutrons
same protons
19
A
pure substance
is
always has exactly the same composition.
opposite composition
No composition
same composition
20
What are the columns (vertical) of the periodic chart called?
periods
valence
groups
family
21
Can an element be broken down into smaller simpler substance ?
No- many composition
no-fixed composition
yes- it has mixed composition
yes-no two element have same composition
22
which one of subatomic particle the one with the smallest mass is the neutron?
all the same
protons
neutrons
electrons
23
what is a Precipitate ?
any solid that forms and separates from a liquid mixture
liquid that form to gas
solid from to liquids
power that look like cottage cheese
24
According to Bohr’s model of the atom, WHAT can happen when an atom gains energy?
A neutron can be changed into a proton.
A proton can move to a higher energy level
An electron can move to a higher energy level.
An atom returns to its ground state.
25
What are the branches of natural science?
Anatomy, Life science and physic
Earth science, Physical and Life science
Physics, Chemistry and Genetics
Biology, Physics, and chemistry
26
What is the symbol for Iron?
I
P
Fe
K
27
Who developed the atomic theory? more than one answer
J. J. Thomson’s
Dalton
Niels Bohr
cHADWICK
28
chemical property
is
ability to produce a little change
ability to produce a change in the composition of matter.
ability to produce no change in matter
ability to produce medium change
29
atomic number tells you what subatomic particle
neutrons and electrons
protons
neutrons and protons
atomic mass and electrons
30
What are the two branches of Physical science ?
Organic and inorganic chemistry
Physics and Chemistry
Biology and anatomy
Earth science and space science
31
The two temperature scales
Force
Fahrenheit scale and the Celsius scale.
Kelvin
energy
32
Viscosity
A liquids resistance to flowing
A solid resistance to flowing
A gas resistance to flowing
A suspension resistance to flowing
33
The following is an example of an OBSERVATION:
a green box with rubbery things on the bottom that turn
a car
things in a bag
a mongoose
34
what is an dependent variable?
what you compare experiment to
what you observe and measure
what you keep as the same
what you change in experiment
35
Which group is most reactive?
1
2
3
4
36
How do mixtures differ from pure substances? more than one answer
fixed composition
mixed composition
can be broken down
a substance that is made from 2 or more simpler substances
37
Which group can easily give away their one outer electron? (very reactive) ?
transition
nobles gas
alkali metals
Halogens
38
what is a constant?
something that repeats itself
keep the same
what you change
what you observe or measure
39
The total number of protons and neutrons in an atom’s nucleus
neutrons
mass number
electrons
protons
40
Identify the letter with the lowest ionization energy
X
V
N
A
41
What is an independent variable?
what you observe and measure
What you change in an experiment
what you keep the same
what you compare your experiment to
